Suspension device for vibratory structures



T. C. ROBERTS.

SUSPENSION DEVICE fOR VIBRATORY STRUCTURES.

`APPLICATION FILED Auc..|8.19`21.

Y 1,435,258; Patented Nov. 14, 1922.

INVENTOR G ATTORNEY `Fatented Nov. I4, 1922.

THEODORE C. ROBERTS, or NEW YORK, N. Y., AssIGNOR To COLUMBIA GRAI'IIOI'HONE l, MANUFACTURING COMPANY, OE RRIDCEPORT, CONNECTICUT, A CORPORATION OE DELAWAREL 4sUsI'ENsIoN DEVICE FOR vIBRAToiu;v STRUCTURES.-

Application led August 18,1921: Serial No. 493,474al` e" To all whom 'it may concern.'

Be it known that I, THEoDbRE C. ROBERTS, a citizen of the United States, and a resident of the city of New York, county andv State of New York, have invented certain new and useful Improvements in Suspension Devices for Vibratory Structures, .of which the following, taken in connection with the accompanying drawings, 1s a specification.

This invention relates to a supporting or suspending means for vibratory or other mobile structures, and with particular reference to a suspension means for the electric motor of a commercial dic'tating miachine of the dictaphone`type.

An object of the invention is to provide a simple and inexpensive means ofconnecting two structures so that any movement of the one will not be transmitted to the other, but will be absorbed in the connection means.

lAnotherobject ,is to provide such Va structure as can be ,assembled and mountedin the easiest and quickest possible manner; and one that will be most durablein use.

A further Object is to Simplify the' com. vstruction -of such a device by providing standard parts, a plurality of which, may bev assembled and used in interlocking relation in each device.

`With these 'and other Objects in View, one form of the invention, as applied to a specific use,is shown in the accompanying drawiings, and this will'be hereinafter more fully described with reference thereto, and the invention finally pointed out inclaims.

In the drawings- F `g. l is a perspective view of'a dictaphone, showing the top' raised and exposaccording to .this invention;

Fig. 2 is a perspective view of one ofthe Y ltwo hook members forming a partof the dethe hook members. e

' lower hook member;

vice, this being the upper one;

Fig. 3 isa perspective view of the resilient pad, which, in use, is assembled between Fig. f1 is a perspective view of the othergr Fig. 5 isay perspective View of the upper member,- showing the insulatlon pad arrangedtherein, preparatory to the insertion o'f the lower member;

.the supporting plate 18 ofthe The lower member 11, Fig. 4:, is'identicalis` relatively longer than the Fig. 6 is a similar view, showing the lower -hook member partially assembled to the up,- per member;

Fig. 7 is a like perspective View of the completely assembled device; and

Flg. 8 1s a vertical sectional View, partly in elevation, of one of the. devices, being taken along the line 8 8 of Fig. 1.

Similar reference characters indicatenorresponding parts throughoutlthe several figures ofthe drawing. l" s Referring tothe drawings, 4the device commembers 10 and 1 1` (Figs. 2 and 4) in form of U-,shaped hooks. ber 10, Fig.' 2, consists of tions, posed in parallel relation, and'conne'cted by a portion 14 disposed at right anglesthereto. The portion 12 projects beyond the portions 13 and 14 at one side, formingan overhanging ledge 15; and centrally of theportion 12, thereis provided ja threaded stud 16 riveted in place, as show-n inLFig. 8, and adapted to be securedto the'boss 17 at the The upper memflat spaced porictaphone. inform with the upper member 10, and con.- sists of parallel portions 19, and 20, aconnecting portion 21, and a projecting portion 12 and 13, of rectangular form, disi "Ili/ nder side of 22 on the portion 19. A threaded stud 23 Ais also secured centrally of the portion 19, but stud 16, or member 10, 'and has a kerf 24 cut in its end.

A resilient, vibration -absorbing pad is.-

lar'lapted to lbe interposed between the` members in their interlocking relation, this pad being of right-angleformfand comprising three vsquare This pad-may be formed of rubber, lt, fabricized rubber, or other suitable' resilient material pand may', in yadd1t1on,'or 1n place'of its function of provid;v

ing a vibration insulator, 'falsoinsulate the supporting from thev Asupported structure,- electrically or thermally, in which case fibre, asbestos, or any other suitable material may be employed. Rubber is an example of a Jmaterial that combines the three characterand thermalinsulatin istics of being resilient, electric insulating, In mounting theyevice to support the andl integral portions 25, 26, l and k27 (Fig. 3).

motor, as here disclosed, the upper membert being resilient to such an extent as lteabis first secured to the boss 17 of the supsorb the vibrations of the motor-frame, as

porting plate, Fig. 8;v the pad is then astransmitted by the motor, and so `prevent sembled thereto, as shown in Fig. 5, the portheir transmission through to thebase-plate.

5 tion 25 .being folded over upon the portion rlhe .invention/r is thus seen to provide an 26 and positioned between the portions 12 extremely simple and inexpensive vibrationand 13, with the bight of the fold engaging absorbing connetion means, and one that 'the connecting' portion 140i part 10, while lends itself espe ially to the useL disclosed theportion 27 ofthe. pad is folded beneath herein, namely-'the supporting of motors .10 the portion 13, thebight of this fold belng for sound` recording and reproducing madisposed beneath the ledge portion 15, Figs. chines.

5 and 6. v` ,i While the drawings illustra-te, andthe The lower member 11 is thereupon slipped specification describes rather specifically a into, interlocking relation with upper mempreferred form of the device for a particu- 15 ber 10, as shown in Figs. 6 to 8, the portion lar.` use, it will be understood that major 2O engaging between the portions 25 and 26 changes involving omission, substitution, re-

of the pad and the portions 12 and 1 3 of the versal, or other changes in' the device, its

member' 10, while the portion 19 engages detailed construction or assemblagemay be beneath the portion 27 of the pad andthe made without departing from thescope of A portion 13 oi the member 10, the invention. For instance, while here lhe members 10 and 11, Figs. 2 and 4, are shown asl a suspension means, it is apparent formed of metal, or other suitable material, the device is'equally well vadapted'forA -use as the resilient pad being tightly engaged bea supporting means; while shown for a spetween them, so that thel metal parts are ei'l'ec- Loific use, it. may,of course, be used wherever af 25 tually insulated and separated, and a com- P readily-detachable movementabsorbing or P210t resilient Structfu'e is PIOVdd- D the electrical-insulating, orheat-insulating conassembled -position of the parts (Figs. 7,- and nection is' required. i 8), ther-studs 16 and 23 are-in axial align- In short, this invention is not limited to `1ment, their common axis passing centrallyi the specific disclosure, but includes all the 3o through the interlocking members 10 and 11. modifications Coming The devices are secured upon thebosses the appended claims.

17, situated at four points 0n the lllldl Sld'e f Having nowdescribed the invention, what of the plate 18, and in register with the four is claimed as new, and for which Letters p'cornersof the motor-frameto be supported. Patentlis desired, is: f

35 r1 hese corner portions ofthe frame are pro.- 1. A suspension devicefor vibratorystrucwithin the scope.y of

vided; with bushed apertures 28, Fig. 8, entures, comprising a pair of lll-shaped selfgaged by thel studs 23; washers 29 and 30 sustaining interlocking members having A nuti31`is secured to the end of the Stud allel and spaced relation to efach other and 40 '23 and. rigidly connects the\motorframe to in horizontal planes, and their connecting i the portion `19 of the lower hook member,

' thus resiliently supporting the motor-frame fromI the completely assembled .suspension device. Lj

The hook suspension devices are so larranged, wth relation to each other, that yported structure, and an Lshaped resilient "their vertically-disposed portions 14 and 21 pad folded into the three spaces between the .cooperate to positively lix the 'motor-frame adjacent surfaces 'of saidf members, the

-against "lateralshifting movement. Asis bightsof the folds'spacing theconnecting portions contigugous to each other to prevent one of said-members to a supporting struc- 45 oclear from Fig. 1,-the portion 21 of the front portions of each of said members from the left hand device cooperates with the portion opposededge of the other of said members. 21 of'the rear` leftl hand device t5 pre ent 2. ,A suspension device for vibratory `transverse'lateral' .movement of the fr me, structures, comprising a pair of interlocking while portion 14 of the front left hand demembers, each consisting of an upper porl 55 vice .cooperates with Athe portion 21 of the` tion, a lower portion, and a connecting por- Ifront right hand device to prevent longitution connecting the upper land lower portions dinal lateral'movement l this being so bealong. one side and spacing themapart, one cause portion 14 is attached to the base-plate, (it said portions being cut away along one and .21 to the motor-frame. And similar 6o locking is e'ected by the two rear devices. The four devices positively fix 'the position ,of the motor-frame against bodily 'movement, an,d yety provide a suspension.-

connection which entirelyl insulates the mo- 05 tor-frame from the baseiplate, the devices with the connecting portion of one member disposedin the cut away portion of the other member, whereby the surface of said con. nectingr portion is substantially flush with. an edge oi said other member, and a resilient pad interposed between the adjacent surfaces lateral disengaging movement in two direc-HV tions at right angles, means 'for attaching ture, means for attaching the other to a sup= side, the members adapted to be interlocked'7 being provided at'the ends of the bushing. their parallel side portions disposed inparwv Y of the members land comprising an intermediate'rectangular portion andv two end rectangular portions extending along two con' tiguous edges thereof, said portlons being respectively folded' into said spaces to separate the adjacent lateral surfaces of the members, the surfaces of'said connecting portions and rthe out away` portion, bein e one of said portions being relatively wider and projecting f beyond,the other portion along a side adjacent ,the connecting portion, the members being adapted to be intlocked with the! wider? portion outermost each member adapted to embrace the narrowerportion of the other member with the connecting portionof one member disposed ad-vv jacent to and in flush relation to the project?v ing portion of the,l other member, and resilient means interposed between the adjacent surfaces ofssaid members and housed 'along two of it's edges beneath the projecting p'orT tions of the members. j N' ILUA supporting device for vibratory structures, comprising a pair of interlock-Y ing members, each consisting of an upper portion, a lower portion, anda, connecting portion connecting the upper and lower portions along one side and spacing them apart,

-one of said portions being relatively wider ad projecting beyond `the ,other portion along ya side adjacent the connecting portion,

the members being adapted to be interlocked withJ the wider portion outermost, each member adapted to embrace the narrower portio offthe other member with the connecting portion of one member disposed-adjacent to f i and in flushfrelation to the projecting portion of the other -`member, Yresilient means interposed between the adj'acenturfaces of said members and housed along' twoof its ledges beneath the projecting portions of the members, and connection means for the sup'- centrally of said wider portions bers.

.' i 5. In a v'ibration-absorbingstructure, the

combination of twofUeshaped interlocking members, the bend of each member being on adjacent -sides when vin interlocked position,

4vand. an L-shaped vibration-absorbing -ypad adapted to vbe interposed between the sur; faces of vthe two members. Signed at Bridgeport, in the county of Fairfield and State of Connecticut, this lthl dayof 'AugustA D. 1921.

.rHEoDoRE c.' ROBERTSS ,i 

